
Dr. Michael C. Nolan, Arecibo Observatory Director / Head of Solar System Studies

Hector Camacho, Visitor Center Director

a large limestone sinkhole provided a natural geometry for the
construction of the 305 meter reflector

the Arecibo Ionospheric Observatory (AIO) is in operation since 1963

the world largest reflector

Guided Tour underneath the Primary Reflector in SUVs

Two original radar outlets in 1:1 scale and one of the supporting concrete colums

The controllable Gregorian Dome with its subreflectors and new electronics greatly increases the capability of the telescope

Elliot González Rodríguez, Telescope Operation Staff in the Control Room, Gregorian Dome visible through window

Elliot González Rodríguez, Telescope Operation Staff

Luis Quintero from the Arecibo Observatory in the Digital Lab



The huge waveguide is leading the radar energy to the antennas through the rainforest

Impression from the backup power station (background), running on diesel (tanks to the right)
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